Weather on April 15
Simi Valley, CA
55 Years of Data
About This Date
April 15th in Simi Valley, CA typically brings pleasant spring weather, with average highs around 71°F and lows near 50°F. Over 31 years of records, the warmest April 15th was in 1999 (75°F average), while the coldest was 2009 (47°F) — a 28°F range across recorded history. This date has historically been dry, with little recorded precipitation. Temperatures on this date have remained relatively stable over the past several decades.
Temperatures on this date have remained relatively stable over the past several decades.
Planning for April 15th in Simi Valley, CA? Great weather for outdoor activities.
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2026 | 78° | 52° | 65° | — | — |
| 2025 | 65° | 46° | 55° | — | — |
| 2024 | 67° | 44° | 55° | — | — |
| 2023 | 75° | 49° | 62° | — | — |
| 2022 | 70° | 47° | 58° | — | — |
| 2021 | 72° | 45° | 58° | — | — |
| 2020 | 77° | 59° | 68° | — | — |
| 2019 | 72° | 47° | 59° | — | — |
| 2018 | 78° | 53° | 66° | — | — |
| 2017 | 81° | 54° | 67° | — | — |
| 2016 | 70° | 50° | 60° | — | — |
| 2015 | 77° | 57° | 67° | — | — |
| 2014 | 80° | 58° | 69° | — | — |
| 2013 | 62° | 46° | 54° | — | — |
| 2012 | 63° | 43° | 53° | — | — |
| 2011 | 84° | 61° | 72° | — | — |
| 2010 | 70° | 46° | 58° | — | — |
| 2009coldest | 57° | 37° | 47° | — | — |
| 2008 | 64° | 48° | 56° | — | — |
| 2007 | 61° | 45° | 53° | — | — |
| 2006 | 61° | 52° | 56° | — | — |
| 2005 | 79° | 59° | 69° | — | — |
| 2004 | 66° | 52° | 59° | — | — |
| 2003 | 61° | 43° | 52° | — | — |
| 2002 | 64° | 50° | 57° | — | — |
| 2001 | 71° | 49° | 60° | — | — |
| 2000 | 63° | 47° | 55° | — | — |
| 1999warmest | 81° | 69° | 75° | — | — |
| 1998 | 58° | 39° | 48° | — | — |
| 1997 | 85° | 56° | 70° | — | — |
| 1996 | 79° | 54° | 66° | — | — |
Simi Valley, CA Temperature Range by Month
Average monthly highs and lows. The shaded band shows the typical daily temperature range.
Simi Valley, CA Daily Temperature Calendar
Average daily high temperature for every day of the year. Each cell is the climatological mean for that calendar day across 55 years of NOAA data.
Best Time to Visit Simi Valley, CA
Most pleasant months in Simi Valley, CA: January, March, April, May, June, October, November.